Only do this if you are sure that it is infringement, if unsure flag as “other” becasue you want a curator to see it then, rather than automatically getting rid of the image.
No, what creates a burden is flagging hundreds of images that don’t break the rules just because they are human, this is the only activity I asked them to stop. Every rule breaking image should be flagged whether there are 2 or 2,000 of them